Display device

Abstract

The utility model provides a display device which comprises a display module and at least one sound production module arranged on the display module, the display module comprises a light guide plate and a back plate which are stacked, and the back plate is provided with at least one group of through holes; the at least one sound production module comprises a first sound production assembly and a second sound production assembly, and the first sound production assembly covers part of the through holes in the at least one group of through holes; the second sound production assembly covers the other part of the through holes in the at least one group of through holes; the first sound production assembly and the light guide plate form a first vibration cavity in part of the through holes, the second sound production assembly and the light guide plate form a second vibration cavity in the other part of the through holes, and vibration generated by the first sound production assembly and the second sound production assembly is transmitted to the light guide plate through the first vibration cavity and the second vibration cavity. The first sound production assembly and the second sound production assembly are matched to produce sound, and each sound production module comprises the sound production assemblies with different frequencies, so that the sound production quality of the display device is better.

Description

Technical Field

[0001] The utility model relates to the technical field of display technology, and particularly relates to a display device. Background Art

[0002] At present, Organic Light-Emitting Diode (OLED) display screens have gradually become a widely adopted display technology in the display field due to their clear images and distinct contrast. However, consumers' demands for display screens are getting higher and higher. They not only have high demands for image quality but also for sound quality. Screen sound generation technology is gradually widely applied in OLED display devices. The screen sound generation technology requires an audio exciter to be fixed on the screen to drive the screen to vibrate and generate sound. However, since a backlight is required to drive a Liquid Crystal Display (LCD) screen, the audio exciter can only be arranged on the backlight. Due to the limited installation position of the audio exciter, the screen sound generation effect is poor. Summary of the Utility Model

[0003] In view of this, the purpose of the present utility model is to provide a display device to solve some or all of the technical problems in the background art.

[0004] Based on the above purpose, the present utility model provides a display device, including:

[0005] A display module, including a light guide plate and a backplane arranged in a stacked manner, and at least one group of through holes is provided on the backplane;

[0006] At least one sound generation module, arranged on a side of the backplane away from the light-emitting direction of the display module, the sound generation module includes a first sound generation component and a second sound generation component, the first sound generation component covers some of the through holes in the at least one group of through holes; the second sound generation component covers another part of the through holes in the at least one group of through holes;

[0007] Wherein, the first sound generation component and the light guide plate form a first vibration cavity in the some through holes, and the second sound generation component and the light guide plate form a second vibration cavity in the another part of the through holes, and vibrations respectively generated by the first sound generation component and the second sound generation component are transmitted to the light guide plate through the first vibration cavity and the second vibration cavity.

[0008] Optionally, the first vibration cavity and the second vibration cavity form a sound channel, and the light guide plate transmits the vibration to the display module through the sound channel.

[0009] Optionally, the display device includes two sound generation modules, and the two sound generation modules are respectively used to form a left sound channel and a right sound channel.

[0010] Optionally, the first sound generating component includes a vibration film and a vibrator that are stacked on one side of the back plate away from the light emitting direction. The orthographic projection of the vibration film on the back plate overlaps with the orthographic projection of the through hole on the back plate, and the orthographic projection of the vibrator on the back plate is within the orthographic projection of the through hole on the back plate.

[0011] Optionally, the second sound generating component includes a sound generator disposed on one side of the back plate away from the light emitting direction. The orthographic projection of the sound generator on the back plate overlaps with the orthographic projection of the through hole on the back plate.

[0012] Optionally, an adhesive layer is provided between the sound generator and the back plate.

[0013] Optionally, the display module further includes an optical film layer, a buffer layer, and a display panel that are stacked on one side of the light guide plate in the light emitting direction.

[0014] Optionally, a reflective layer is provided between the light guide plate and the back plate.

[0015] Optionally, the thickness range of the back plate is: 0.8 mm to 1.2 mm.

[0016] Optionally, the thickness range of the light guide plate is: 1.5 mm - 2 mm.

[0017] Optionally, the thickness range of the buffer layer is: 0.86 mm to 1.26 mm.

[0018] Optionally, the thickness range of the vibration film is: 0.3 mm to 0.8 mm.

[0019] Optionally, the through hole is rectangular, with a width range of: 35 mm to 55 mm and a length range of: 55 mm to 75 mm.

[0020] As can be seen from the above, a display device provided by the present utility model includes a display module and at least one sound module disposed on the display module. Among them, the display module includes a light guide plate and a back plate stacked, and at least one group of through holes are provided on the back plate; at least one sound module is disposed on one side of the back plate away from the light-emitting direction of the display module, and the sound module includes a first sound component and a second sound component. The first sound component covers a part of the through holes in at least one group of through holes; the second sound component covers another part of the through holes in at least one group of through holes; the first sound component and the light guide plate form a first vibration cavity in a part of the through holes, and the second sound component and the light guide plate form a second vibration cavity in another part of the through holes. The vibrations generated by the first sound component and the second sound component are transmitted to the light guide plate via the first vibration cavity and the second vibration cavity respectively. In this way, the first sound component and the second sound component cooperate to generate sound, that is, the first vibration cavity and the second vibration cavity cooperate, so that the two groups of sound components cooperate to generate sound, and each sound module includes sound components with different frequencies, making the sound quality of the display device better, thus improving the problem of poor sound effect of the LCD screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present utility model or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 An exemplary LCD display screen is shown.

[0023] Figure 2 A schematic structural diagram of the display device of the present utility model is shown.

[0024] Figure 3 A schematic hierarchical structure diagram of the display device of the present utility model is shown.

[0025] Figure 4 A partial cross-sectional schematic diagram of an exemplary display device of the present utility model is shown.

[0026] Figure 5 A frequency response curve diagram showing the influence of the material and thickness of the back plate on the sound quality is shown.

[0027] Figure 6 A minimum resonance frequency curve diagram showing the influence of the material and thickness of the back plate on the sound quality is shown.

[0028] Figure 7 A total harmonic distortion curve diagram showing the influence of the material and thickness of the back plate on the sound quality is shown.

[0029] Figure 8 The frequency response curve diagram showing the influence of the thickness of the light guide plate on the sound quality.

[0030] Figure 9 The lowest resonance frequency curve diagram showing the influence of the thickness of the light guide plate on the sound quality.

[0031] Figure 10 The total harmonic distortion curve diagram showing the influence of the thickness of the light guide plate on the sound quality.

[0032] Figure 11 The frequency response curve diagram showing the influence of the thickness of the buffer layer on the sound quality.

[0033] Figure 12 The lowest resonance frequency curve diagram showing the influence of the thickness of the buffer layer on the sound quality.

[0034] Figure 13 The total harmonic distortion curve diagram showing the influence of the thickness of the buffer layer on the sound quality.

[0035] Figure 14 The frequency response curve diagram showing the influence of the thickness of the diaphragm on the sound quality.

[0036] Figure 15 The total harmonic distortion curve diagram showing the influence of the thickness of the diaphragm on the sound quality.

[0037] Figure 16 The frequency response curve diagram showing the influence of the size of the through hole on the sound quality.

[0038] Figure 17 The total harmonic distortion curve diagram showing the influence of the size of the through hole on the sound quality.

[0039] In the attached drawings:

[0040] 01, backlight; 011, left channel; 012, right channel; 013, audio exciter; 1, display module; 2, sound generating module; 21, first sound generating component; 22, second sound generating component; 221, sound generator; 222, adhesive layer; 211, vibrator; 212, diaphragm; 11, display panel; 12, buffer layer; 13, optical film layer; 14, light guide plate; 15, reflective layer; 16, back plate; 161, through hole; 162, first vibration cavity; 163, second vibration cavity; 141, light emitting surface; 142, backlight surface. Detailed implementation manners

[0041] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further describes the present utility model in detail with reference to specific embodiments and the attached drawings.

[0042] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0043] Based on the description of the background technology, screen sound generation technology is widely used in OLED display devices. Since the display panel of an OLED display device does not require a backlight driver, an audio actuator can be fixed on the screen, and the screen is vibrated by the audio actuator to generate sound. However, for most LCD display devices, which require a backlight driver, they cannot fix the audio actuator on the panel like OLED display devices to vibrate and generate sound. Therefore, the audio actuator can only be fixed on the backlight, and by using the characteristics such as the transmission of the low-frequency band and the diffraction of the high-frequency band of sound, the sound is transmitted to the front of the LCM (Liquid Crystal Module, i.e., the liquid crystal module or the LCD display module) to achieve the effect of screen sound generation. Exemplarily, Figure 1 An exemplary LCD display screen is shown, such as Figure 1 As shown, the audio actuator 013 in the LCD display screen is fixed on the backlight 01. There is a groove on the backlight 01, and the audio actuator 013 is fixed in the groove. The groove is divided into a left channel 011 and a right channel 012 via a dividing line a. An audio actuator 013 is provided in each channel. In this way, the sound generation of the LCD display device is achieved by the cooperation of the two audio actuators 013 provided in the left channel 011 and the right channel 012. However, the sound generation effect of the LCD screen with this structure is poor, which may cause problems such as dull sound, insufficient shock in the low frequency, insufficient restoration of the middle and high frequencies, and large distortion.

[0044] Figure 2 The structural schematic diagram of the display device of the present invention is shown.

[0045] Figure 3 The hierarchical structural schematic diagram of the display device of the present invention is shown.

[0046] Such as Figure 2 and Figure 3As shown, a display device includes: a display module 1 and at least one sound module 2 disposed on the display module 1. Specifically, the display module 1 and the at least one sound module 2 can be integrated into the display device through a housing. Specifically, the display module 1 includes a light guide plate 14 and a back plate 16 stacked, and at least one set of through holes 161 is provided on the back plate 16. At least one set of through holes 161 is provided on the back plate 16, and the sound module 2 is disposed on the side of the back plate 16 away from the light-emitting direction of the display module 1. The sound module 2 can transmit vibrations to the light guide plate 14 through the through holes 161 to achieve screen sound. Preferably, the vibration frequency of this vibration is within the range audible to the human ear, for example, between 20 - 20000 Hz. Each set of through holes 161 can include two through holes 161, which are respectively used to install sound components of different audio frequencies. In this way, when the sound components of different audio frequencies cooperate to generate sound, the sound quality of the display device can be better.

[0047] Exemplary materials for the back plate 16 can be metals such as aluminum or plastics. The back plate 16 is disposed on the side of the light guide plate 14 away from the light-emitting direction of the display module 1.

[0048] In some embodiments, with continued reference to Figure 2 and Figure 3 As shown, the light guide plate 14 includes a light-emitting surface 141 (exemplarily, the upward direction of the light-emitting surface 141 is the light-emitting direction) and a backlight surface 142. The display module 1 further includes an optical film layer 13, a buffer layer 12, and a display panel 11 stacked on one side along the light-emitting direction of the light guide plate 14. Specifically, the display module 1 further includes an optical film layer 13, a buffer layer 12, and a display panel 11 stacked on the light-emitting surface 141 of the light guide plate 14. The optical film layer 13 is used to reflect the light provided by the light source for the light guide plate 14 to conduct light. The buffer layer 12 is used to buffer when the display panel 11 is installed and can be a foam tape. It should be noted that the material of the light guide plate 14 can be, for example, plastic, glass, or a composite material. The light source provides illumination light, which can be guided from the light-incident side of the light guide plate 14 (for example, the side surface of the light guide plate 14) to the light-emitting surface 141 through the total internal reflection characteristic of light between media. The first sound component 21 and the second sound component 22 are disposed on the side of the back plate 16 away from the backlight surface 142 of the light guide plate 14 and generate vibrations through the through holes 161. Preferably, the vibration frequency of this vibration is within the range audible to the human ear, for example, between 20 - 20000 Hz. In this embodiment, the first sound component 21 and the second sound component 22 can be directly attached to the back to transmit vibrations to the light guide plate 14 through the through holes 161; that is, the vibrations are indirectly transmitted to the light guide plate 14. The vibrations are directly or indirectly transmitted to the light guide plate 14 to generate resonance on the light guide plate 14, and the through holes 161 are used as resonance cavities. It should be noted that Figure 2 and 3Only a part of the first sound - generating component 21 and the second sound - generating component 22 are shown for simplicity of illustration. However, multiple first sound - generating components 21 and second sound - generating components 22 can also be configured. This utility model is not limited to the number of the first sound - generating component 21 and the second sound - generating component 22. With this arrangement, a speaker can be provided in the relatively thin space on the back side of the display device without affecting the display effect of the display device. In addition, this arrangement can also increase the screen - to - body ratio of the display device.

[0049] As Figure 2 and Figure 3 shown, the sound - generating module 2 includes a first sound - generating component 21 and a second sound - generating component 22. The first sound - generating component 21 covers a part of the through - holes 161 within the at least one group of through - holes 161; the second sound - generating component 22 covers another part of the through - holes 161 within the at least one group of through - holes 161.

[0050] Exemplarily, the first sound - generating component 21 is a high - frequency sound - generating component. That is to say, the first sound - generating component 21 is used for generating sound with a frequency between 10 kHz and 20 kHz. Therefore, the sound - generating component for this frequency range is called a high - frequency sound - generating component. The second sound - generating component 22 is a mid - low - frequency sound - generating component. That is to say, the second sound - generating component 22 is used for generating sound with a frequency between 20 Hz and 9 kHz. Therefore, the sound - generating component for this frequency range is called a mid - low - frequency sound - generating component. The first sound - generating component 21 covers one of the two through - holes 161, and the second sound - generating component 22 covers the other through - hole 161. In this way, the first sound - generating component 21 and the second sound - generating component 22 (i.e., the high - frequency sound - generating component and the mid - low - frequency sound - generating component) can cooperate to generate sound, making the sound quality of the display device better, thus improving problems such as poor sound - generating effect of the LCD screen, which may lead to dull sound, insufficient low - frequency shock, insufficient mid - high - frequency restoration, and large distortion.

[0051] In this embodiment, as Figure 2 and Figure 3 shown, the first sound - generating component 21 and the light - guide plate 14 form a first vibration cavity 162 within the part of the through - holes 161, and the second sound - generating component 22 and the light - guide plate 14 form a second vibration cavity 163 within the other part of the through - holes 161. The vibrations generated by the first sound - generating component 21 and the second sound - generating component 22 are respectively transmitted to the light - guide plate 14 through the first vibration cavity 162 and the second vibration cavity 163.

[0052] Exemplarily, the at least one set of through holes 161 includes two sets, and the two sets of through holes 161 are symmetrically arranged on the back plate 16 along the dividing line b. Each set of through holes 161 includes two through holes 161 respectively. At least one sound-emitting module 2 includes two sets of sound-emitting modules 2. Each set of sound-emitting modules 2 includes a first sound-emitting component 21 and a second sound-emitting component 22 respectively. The first sound-emitting component 21 covers the through holes 161 arranged near the edge of the back plate 16, and the second sound-emitting component 22 covers two adjacent through holes 161 in the middle. In this way, each set of sound-emitting modules 2 is symmetrically arranged along the dividing line b. The first sound-emitting component 21 can be adhered to the back plate 16. After the first sound-emitting component 21 emits sound, a vibration cavity will be formed in the corresponding through hole 161 on the back plate 16, that is, the first sound-emitting component 21 and the light guide plate 14 form a first vibration cavity 162 in the through hole 161. Exemplarily, after the first sound-emitting component 21 emits sound, a first vibration cavity 162 is formed in the through hole 161 near the edge on the back plate 16. The second sound-emitting component 22 can be adhered to the back plate 16. After the second sound-emitting component 22 emits sound, a vibration cavity will be formed in the corresponding through hole 161 on the back plate 16, that is, the second sound-emitting component 22 and the light guide plate 14 form a second vibration cavity 163 in another through hole 161. Exemplarily, after the second sound-emitting component 22 emits sound, a second vibration cavity 163 is formed in the through hole 161 far from the edge on the back plate 16. In this way, the first vibration cavity 162 and the second vibration cavity 163 cooperate to enable the two sets of sound-emitting modules 2 to cooperate in emitting sound, and each set of sound-emitting modules 2 includes sound-emitting components with different frequencies, making the sound quality of the display device better.

[0053] Figure 4 Fig. shows a partial cross-sectional schematic diagram of an exemplary display device of the present invention.

[0054] Referring to Figure 4 , the first vibration cavity 162 and the second vibration cavity 163 form a sound channel, and the light guide plate 14 transmits the vibration to the display module 1 via the sound channel. Specifically, the first sound-emitting component 21 and the second sound-emitting component 22 cooperate in emitting sound. Therefore, the first vibration cavity 162 formed by the first sound-emitting component 21 and the through hole 161 and the second vibration cavity 163 formed by the second sound-emitting component 22 and another through hole 161 form a sound channel. In this way, different audio frequencies can be emitted in the sound channel. In this way, the cooperation of the sound-emitting components with different audio frequencies can make the sound quality of the display device better, thereby improving problems such as poor sound effect of the LCD screen, which may cause dull sound, insufficient shock in low frequencies, insufficient restoration of medium and high frequencies, and large distortion.

[0055] Exemplarily, referring to Figure 4 , the display device includes two sound-emitting modules 2, and the two sound-emitting modules 2 are respectively used to form a left sound channel 011 and a right sound channel 012. Specifically, continue to refer to Figure 1 andFigure 2 , taking the dividing line b as the reference, a set of through holes 161 are respectively arranged on the left side and the right side of the back plate 16 relative to the dividing line b, and two sound emitting modules 2, one of the sound emitting modules 2 is arranged on the through holes 161 on the left side, and the other sound emitting module 2 is arranged on the through holes 161 on the right side. Among them, the first sound emitting component 21 is used for high-frequency sound emission, the second sound emitting component 22 is used for medium and low-frequency sound emission, the first sound emitting component 21 covers the through holes 161 near the edge on the left side, the second sound emitting component 22 covers the through holes 161 far from the edge, the first sound emitting component 21 and the through holes 161 form a first vibration cavity 162, and the second sound emitting component 22 and the other through holes 161 form a second vibration cavity 163. Specifically, as Figure 2 shown, the first vibration cavity 162 and the second vibration cavity 163 on the left side form a left channel 011, and the first vibration cavity 162 and the second vibration cavity 163 on the right side form a right channel 012.

[0056] In some embodiments, continue to refer to Figure 3 and Figure 4As shown, the first sound generating component 21 includes a vibration membrane 212 and a vibrator 211 which are stacked on one side of the back plate 16 away from the light emitting direction. The orthographic projection of the vibration membrane 212 on the back plate 16 overlaps with the orthographic projection of the through hole 161 on the back plate 16, and the orthographic projection of the vibrator 211 on the back plate 16 is within the orthographic projection of the through hole 161 on the back plate 16. Specifically, the vibration membrane 212 and the vibrator 211 are stacked, and the vibrator 211 is arranged on the side of the vibration membrane 212 away from the through hole 161. In this way, after the vibrator 211 generates sound, the vibration membrane 212 transmits the vibration generated by the vibrator 211 into the through hole 161, and is transmitted to the light guide plate 14 via the through hole 161, driving the light guide plate 14 to generate sound, thereby realizing the sound generation of the display device. Further, the orthographic projection of the vibration membrane 212 on the back plate 16 overlaps with the orthographic projection of the through hole 161 on the back plate 16, and the orthographic projection of the vibrator 211 on the back plate 16 is within the orthographic projection of the through hole 161 on the back plate 16. Exemplarily, the orthographic projection of the through hole 161 on the back plate 16 is within the orthographic projection of the vibration membrane 212 on the back plate 16, and the orthographic projection of the vibrator 211 on the back plate 16 is within the orthographic projection of the through hole 161 on the back plate 16. That is to say, the bottom area of the vibration membrane 212 is larger than the planar area of the through hole 161, and the area of the vibrator 211 is smaller than the area of the through hole 161. In this way, a more stable vibration cavity can be formed between the vibration membrane 212, the through hole 161 and the light guide plate 14, so that the vibration force generated by the vibration cavity is stronger, and the sound generation effect of the display device is better. Exemplarily, the vibrator 211 can be any one of a piezoelectric sensor and a piezoelectric ceramic driver, but is not limited thereto. The piezoelectric ceramic is, for example, lead zirconate titanate (PZT) or a piezoelectric polymer. The material of the vibration membrane 212 can be, for example, a metal sheet, cotton or rubber, etc., but is not limited thereto.

[0057] In some embodiments, with continued reference to Figure 3 and Figure 4 As shown, the second sound generating component 22 includes a sound generator 221 arranged on one side of the back plate 16 away from the light emitting direction. The orthographic projection of the sound generator 221 on the back plate 16 overlaps with the orthographic projection of the through hole 161 on the back plate 16.

[0058] Exemplarily, the sound generator 221 may be a speaker, and an adhesive layer 222 is provided between the sound generator 221 and the back plate 16. The adhesive layer 222 may be adhesives or buffer tapes exemplarily. The adhesives may be any one of double-sided tapes, UV adhesives, EVA adhesives, TPU adhesives, etc. That is to say, it can be understood that the sound generator 221 is pasted on the back plate 16 through the adhesive. The orthographic projection of the sound generator 221 on the back plate 16 overlaps with the orthographic projection of the through hole 161 on the back plate 16. Exemplarily, the bottom area of the sound generator 221 is larger than the planar area of the through hole 161. In this way, the sound generator 221 can stably cover the through hole 161 through the adhesive layer 222. The vibration generated by the sound generator 221 is transmitted to the light guide plate 14 through the through hole 161. A more stable vibration cavity is formed among the sound generator 221, the through hole 161, and the light guide plate 14, so that the vibration force generated by the vibration cavity is stronger, thereby enabling the display device to vibrate and generate sound, and the sound effect is better.

[0059] In some embodiments, with continued reference to Figure 3 and Figure 4 as shown, a reflective layer 15 is provided between the light guide plate 14 and the back plate 16. Specifically, the reflective layer 15 is used to reflect the light irradiated on the vibrator 211, the vibration film 212, and the sound generator 221. The light source is, for example, the light reflected from the display panel 11 or the optical film layer 13 (optical thin film) located between the light guide plate 14 and the display panel 11, but is not limited thereto. This setting can make the vibrator 211, the vibration film 212, and the sound generator 221 located on the back plate 16 invisible on the display panel 11.

[0060] Figure 5 The frequency response (FR) graph showing the influence of the material and thickness of the back plate on the sound quality is shown.

[0061] As Figure 5 shown, Figure 5 it is shown in that the material of the back plate 16 may include aluminum plates and iron plates. Among them, the thickness range of the back plate 16 is: 0.8 mm to 1.2 mm. In the present invention, taking the thickness of the aluminum plate back plate 16 (i.e., the aluminum back plate 16) being 0.8 mm, the thickness of the aluminum plate back plate 16 (i.e., the aluminum back plate 16) being 1.2 mm, and the thickness of the iron plate back plate 16 (i.e., the iron back plate 16) being 0.8 mm as examples, tests are carried out to obtain the frequency response graph. It should be noted that the abscissa in the frequency response graph is the frequency, and the ordinate is the impedance value.

[0062] Figure 6 The graph showing the lowest resonance frequency (such as F0 in Figure 6 ) of the influence of the material and thickness of the back plate on the sound quality is shown.

[0063] As Figure 6 shown,Figure 6 It is shown that the material of the backplane 16 may include aluminum sheet and iron sheet. Among them, the thickness range of the backplane 16 is: 0.8 mm to 1.2 mm. In this utility model, taking the backplane 16 made of aluminum sheet (i.e., aluminum backplane 16) with a thickness of 0.8 mm, the backplane 16 made of aluminum sheet (i.e., aluminum backplane 16) with a thickness of 1.2 mm, and the backplane 16 made of iron sheet (i.e., iron backplane 16) with a thickness of 0.8 mm as examples, tests are carried out to obtain the minimum resonance frequency curve graph. It should be noted that the abscissa in the minimum resonance frequency curve graph is frequency, and the ordinate is impedance value.

[0064] Figure 7 It shows the total harmonic distortion (THD) curve graph of the influence of the material and thickness of the backplane on the sound quality.

[0065] As Figure 7 shown, Figure 7 It is shown that the material of the backplane 16 may include aluminum sheet and iron sheet. Among them, the thickness range of the backplane 16 is: 0.8 mm to 1.2 mm. In this utility model, taking the backplane 16 made of aluminum sheet (i.e., aluminum backplane 16) with a thickness of 0.8 mm, the backplane 16 made of aluminum sheet (i.e., aluminum backplane 16) with a thickness of 1.2 mm, and the backplane 16 made of iron sheet (i.e., iron backplane 16) with a thickness of 0.8 mm as examples, tests are carried out to obtain the total harmonic distortion curve graph. It should be noted that the abscissa in the total harmonic distortion curve graph is frequency, and the ordinate is impedance value.

[0066] Compared with the spectrum test results of the backplane 16 (as Figure 5 shown), the minimum frequency test results (as Figure 6 shown), the minimum frequency test results (as Figure 7 shown), the optimal test result is: the backplane 16 made of iron sheet with a thickness of 0.8 mm is the best. The backplane 16 made of iron sheet with a thickness of 1 mm can also be the second best.

[0067] Figure 8 It shows the frequency response curve graph of the influence of the light guide plate thickness on the sound quality.

[0068] As Figure 8 shown, Figure 8 It is shown that the thickness range of the light guide plate 14 is: 1.5 mm - 2 mm. In this utility model, taking the light guide plate 14 with a thickness of 1.5 mm and 2 mm as examples, tests are carried out to obtain the frequency response curve graph. It should be noted that the abscissa in the frequency response curve graph is frequency, and the ordinate is impedance value.

[0069] Figure 9 It shows the minimum resonance frequency curve graph of the influence of the light guide plate thickness on the sound quality.

[0070] AsFigure 9 As shown Figure 9 It is shown in Figure 9 that the thickness range of the light guide plate 14 is: 1.5 mm - 2 mm. In this utility model, taking the thicknesses of the light guide plate 14 as 1.5 mm and 2 mm as examples, tests are conducted to obtain the curve graph of the lowest resonance frequency. It should be noted that the abscissa in the curve graph of the lowest resonance frequency is frequency, and the ordinate is the impedance value.

[0071] Figure 10 It shows the curve graph of the total harmonic distortion of the influence of the light guide plate thickness on the sound quality.

[0072] As Figure 10 shown Figure 10 It is shown in Figure 10 that the thickness range of the light guide plate 14 is: 1.5 mm - 2 mm. In this utility model, taking the thicknesses of the light guide plate 14 as 1.5 mm and 2 mm as examples, tests are conducted to obtain the curve graph of the total harmonic distortion. It should be noted that the abscissa in the curve graph of the total harmonic distortion is frequency, and the ordinate is the impedance value.

[0073] Compared with the spectrum test results of the thickness of the light guide plate 14 (as Figure 8 shown), the lowest frequency test results (as Figure 9 shown), the lowest frequency test results (as Figure 10 shown), the optimal test result is: the light guide plate 14 with a thickness of 2 mm is the best. The light guide plate 14 with a thickness of 1.5 mm can also be the second best.

[0074] Figure 11 It shows the curve graph of the frequency response of the influence of the buffer layer thickness on the sound quality.

[0075] As Figure 11 shown Figure 11 It is shown in Figure 11 that the thickness range of the buffer layer 12 is: 0.86 mm - 1.26 mm. In this utility model, taking the thicknesses of the buffer layer 12 as 0.86 mm and 1.26 mm as examples, among which, the buffer layers 12 with a thickness of 0.86 mm of ordinary density, 0.86 mm of low density, and 1.26 mm of ordinary density are used for testing to obtain the curve graph of the frequency response. It should be noted that the abscissa in the curve graph of the frequency response is frequency, and the ordinate is the impedance value.

[0076] Figure 12 It shows the curve graph of the lowest resonance frequency of the influence of the buffer layer thickness on the sound quality.

[0077] As Figure 12 shown Figure 12It is shown that the thickness range of the buffer layer 12 is: 0.86 mm - 1.26 mm. In the present utility model, taking the buffer layer 12 with thicknesses of 0.86 mm and 1.26 mm as examples, among them, the buffer layer 12 with a thickness of 0.86 mm of ordinary density, 0.86 mm of low density, and 1.26 mm of ordinary density is used for testing to obtain the lowest resonance frequency curve graph. It should be noted that the abscissa in the lowest resonance frequency curve graph is frequency, and the ordinate is impedance value.

[0078] Figure 13 It shows the total harmonic distortion curve graph of the influence of the buffer layer thickness on the sound quality.

[0079] As Figure 13 shown, Figure 13 It is shown that the thickness range of the buffer layer 12 is: 0.86 mm - 1.26 mm. In the present utility model, taking the buffer layer 12 with thicknesses of 0.86 mm and 1.26 mm as examples, among them, the buffer layer 12 with a thickness of 0.86 mm of ordinary density, 0.86 mm of low density, and 1.26 mm of ordinary density is used for testing to obtain the total harmonic distortion curve graph. It should be noted that the abscissa in the total harmonic distortion curve graph is frequency, and the ordinate is impedance value.

[0080] Compared with the spectrum test results of the thickness of the buffer layer 12 (as Figure 11 shown), the lowest frequency test results (as Figure 12 shown), the lowest frequency test results (as Figure 13 shown), the optimal test result is: the buffer layer 12 with a thickness of 1.26 mm is the optimal. The buffer layer 12 with a thickness of 0.86 mm can also be the second best.

[0081] Figure 14 It shows the frequency response curve graph of the influence of the vibrating diaphragm thickness on the sound quality.

[0082] As Figure 14 shown, Figure 14 It is shown that the thickness range of the vibrating diaphragm 212 is: 0.3 mm - 0.8 mm. In the present utility model, taking the vibrating diaphragm 212 with thicknesses of 0.3 mm, 0.5 mm, and 0.8 mm as examples, tests are carried out to obtain the frequency response curve graph. It should be noted that the abscissa in the frequency response curve graph is frequency, and the ordinate is impedance value.

[0083] Figure 15 It shows the total harmonic distortion curve graph of the influence of the vibrating diaphragm thickness on the sound quality.

[0084] As Figure 15 shown, Figure 15It is shown that the thickness range of the diaphragm 212 is: 0.3 mm - 0.8 mm. In this utility model, taking the thicknesses of the diaphragm 212 as 0.3 mm, 0.5 mm, and 0.8 mm as examples, tests are conducted to obtain the total harmonic distortion curve graphs. It should be noted that the abscissa in the total harmonic distortion curve graphs is the frequency, and the ordinate is the impedance value.

[0085] Compared with the spectrum test results of the thickness of the diaphragm 212 (as Figure 14 shown) and the lowest frequency test results (as Figure 15 shown), the optimal test result is: the diaphragm 212 with a thickness of 0.3 mm is the optimal.

[0086] Figure 16 The frequency response curve graph showing the influence of the through - hole size on the sound quality is shown.

[0087] Exemplarily, the through - hole 161 is rectangular, and the width range of the through - hole 161 is: 35 mm - 55 mm, and the length range of the through - hole 161 is: 55 mm - 75 mm. For example, the through - hole 161 with a width of 35 mm and a length of 55 mm is defined as a small hole, the through - hole 161 with a width of 45 mm and a length of 65 mm is defined as a medium - sized hole, and the through - hole 161 with a width of 55 mm and a length of 75 mm is defined as a large hole. As Figure 16 shown, in this utility model, taking the through - hole 161 as a small hole, a medium - sized hole, and a large hole as examples, tests are conducted to obtain the frequency response curve graph. It should be noted that the abscissa in the frequency response curve graph is the frequency, and the ordinate is the impedance value.

[0088] Figure 17 The total harmonic distortion curve graph showing the influence of the through - hole size on the sound quality is shown.

[0089] Exemplarily, the through - hole 161 is rectangular, and the width range of the through - hole 161 is: 35 mm - 55 mm, and the length range of the through - hole 161 is: 55 mm - 75 mm. For example, the through - hole 161 with a width of 35 mm and a length of 55 mm is defined as a small hole, the through - hole 161 with a width of 45 mm and a length of 65 mm is defined as a medium - sized hole, and the through - hole 161 with a width of 55 mm and a length of 75 mm is defined as a large hole. As Figure 17 shown, in this utility model, taking the through - hole 161 as a small hole, a medium - sized hole, and a large hole as examples, tests are conducted to obtain the total harmonic distortion curve graph. It should be noted that the abscissa in the total harmonic distortion curve graph is the frequency, and the ordinate is the impedance value.

[0090] Compared with the spectrum test results of the size of the through - hole 161 (as Figure 16 shown) and the lowest frequency test results (as Figure 17 shown), the optimal test result is: the through - hole 161 of the large hole is the optimal. The through - hole 161 of the medium - sized hole can also be the second - best.

[0091] It should be noted that some embodiments of the present utility model have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the above embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired result. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0092] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present utility model (including the claims) is limited to these examples; within the concept of the present utility model, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of the present utility model as described above, which are not provided in detail for the sake of brevity.

[0093] Although the present utility model has been described in connection with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. For example, other memory architectures may be used with the embodiments discussed.

[0094] The embodiments of the present utility model are intended to cover all such alternatives, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A display device, characterized in that, Comprising: A display module (1), including a light guide plate (14) and a back plate (16) arranged in a stacked manner, and at least one group of through holes (161) are provided on the back plate (16); At least one sound - generating module (2), arranged on a side of the back plate (16) away from the light - emitting direction of the display module (1), the sound - generating module (2) includes a first sound - generating component (21) and a second sound - generating component (22), the first sound - generating component (21) covers a part of the through holes (161) within the at least one group of through holes (161); the second sound - generating component (22) covers another part of the through holes (161) within the at least one group of through holes (161); Wherein, the first sound - generating component (21) and the light guide plate (14) form a first vibration cavity (162) within the part of the through holes (161), the second sound - generating component (22) and the light guide plate (14) form a second vibration cavity (163) within the other part of the through holes (161), and vibrations respectively generated by the first sound - generating component (21) and the second sound - generating component (22) are transmitted to the light guide plate (14) via the first vibration cavity (162) and the second vibration cavity (163).

2. The display device according to claim 1, wherein The first vibration cavity (162) and the second vibration cavity (163) form a sound channel, and the light guide plate (14) transmits vibrations to the display module (1) via the sound channel.

3. The display device according to claim 1 or 2, characterized in that, The display device includes two sound - generating modules (2), and the two sound - generating modules (2) are respectively used to form a left sound channel (011) and a right sound channel (012).

4. The display device according to claim 1, wherein The first sound - generating component (21) includes a vibration film (212) and a vibrator (211) arranged in a stacked manner on a side of the back plate (16) away from the light - emitting direction, the orthographic projection of the vibration film (212) on the back plate (16) overlaps with the orthographic projection of the through hole (161) on the back plate (16), and the orthographic projection of the vibrator (211) on the back plate (16) is within the orthographic projection of the through hole (161) on the back plate (16).

5. The display device according to claim 1, characterized in that, The second sound - generating component (22) includes a sound generator (221) arranged on a side of the back plate (16) away from the light - emitting direction, and the orthographic projection of the sound generator on the back plate (16) overlaps with the orthographic projection of the through hole (161) on the back plate (16).

6. The display device according to claim 5, characterized in that A bonding layer (222) is provided between the sound generator (221) and the back plate (16).

7. The display device according to claim 1, wherein The display module (1) further includes an optical film layer (13), a buffer layer (12), and a display panel (11) arranged in a stacked manner on a side of the light guide plate (14) in the light - emitting direction.

8. The display device according to claim 1, wherein A reflective layer (15) is provided between the light guide plate (14) and the back plate (16).

9. The display device according to claim 1, characterized in that, The thickness range of the back plate (16) is: 0.8 mm to 1.2 mm.

10. The display device according to claim 8, wherein The thickness range of the light guide plate (14) is: 1.5 mm - 2 mm.

11. The display device according to claim 7, characterized in that, The thickness range of the buffer layer (12) is: 0.86 mm to 1.26 mm.

12. The display device according to claim 4, characterized in that, The thickness range of the vibration film (212) is: 0.3 mm to 0.8 mm.

13. The display device according to claim 1, characterized in that, The through hole (161) is rectangular, with its width ranging from 35 mm to 55 mm and its length ranging from 55 mm to 75 mm.

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